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Planet Carrier Flexibility, Load Sharing, And Bearing LifeEpicyclic gearboxes are valued for their high torque capacity, compact size, and power density. Several planets can transmit torque around a common sun gear,…
Predicting Gearbox Weight From Torque, Ratio, And SpeedA regression model for predicting gearbox weight based on torque, ratio, and speed can give aerospace engineers a useful estimate before detailed geometry has…
Why gear tooth profile modifications must follow the load spectrumGear tooth profile modifications must be tailored to specific load spectra because a gear does not operate at one constant torque, speed, temperature, or…
Using FEA and DOE to Optimize Gearbox Rib StiffnessA geared aircraft engine gearbox must transmit substantial torque while remaining light, compact, quiet, and reliable. Its housing carries bearings, gears,…
How Oil Aeration Drives Gearbox Pump Cavitation And Lubrication FailureIn a geared aircraft engine, the lubrication system must deliver a stable oil supply while gears, bearings, shafts, and seals operate at high speed. That task…
Surface Roughness and Micropitting Resistance in Gear FlanksMicropitting is a surface fatigue mechanism that can quietly reduce the reliability of a gear pair before conventional tooth breakage, macropitting, or…
Reducing Gearbox Noise Through Damped Gear Web VibrationsIn a geared aircraft engine, acoustic performance is closely tied to mechanical design. The gear mesh generates periodic excitation at the tooth-passing…
Thermal Growth and Gear Backlash in Aircraft GearboxesIn a geared aircraft engine, the gearbox must transmit substantial power while remaining light, quiet, efficient, and dependable across a wide temperature…
Optimizing Helical Gear Load Sharing Through Lead ModificationIn a geared aircraft engine, a helical gear pair must transmit substantial torque while rotating at high speed, within strict limits for mass, noise, heat, and…
Bearing Outer Ring Clearance And Vibration SignaturesBearing outer ring clearance in a housing fit can seem like a small assembly detail, yet it strongly influences how a gearbox behaves under load. The fit…